To post a picture within the post, it has to be a jpeg hosted on another site, and then you bracket the full url address with "img" in brackets at the front and "/img" in brackets at the end. Or you can just post the url and let the reader click on it.

I suppose it vaguely could be considered chiaroscuro but generally the point is to use strong contrast in lighting to create a three-dimensional effect where the subject pops out in relief often against a darker background. In this case, if the subject is your face, it does not have a strong three-dimensional effect due to the light bringing you forward of the background, instead you sort of recede and there is sort of a flatness. But it does have a pervading feeling of darkness, just not a dark background, so it is semi-chiaroscuro.

How isn't it? Im actually looking for an understanding of what is considered chiaroscuro in art

Chiaroscuro is 'light/shadow' or 'light/dark' and is used to create a 3-d effect, beyond simple perspective, as well as adding 'drama'. Your referenced image appears to be more of a silhouette than an example of chiaroscuro.

In the early modern era, painters developed 3-d perspective drawing, but in general the 'light' was often 'flat', without much contrast.

By the mid 1500s, for portraits, one finds heavier use of shadow to give a 3-d effect, when the portrait would not otherwise have significant 'perspective' to cue the 3-d effect.